JPH0531819U - Cutting device for pipe protrusions - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a cutting device that can be easily moved in a pipe and can cut a protrusion in the pipe along an inner surface of the pipe. [Structure] A bogie 1 movable in a pipe, a shaft 7 capable of reciprocating in a pipe axial direction and swinging and rotating in a pipe circumferential direction, a swinging base 9 integrated with the shaft 7, and a drive device thereof. 2, 4,
6 is provided. The rocking table 9 is provided with a cutter blade 10 that is capable of reciprocating in the tube axial direction and the tube radial direction in a state of being projected forward in the tube axial direction, and drive devices 11 and 12 thereof.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cutting device capable of remotely cutting a pipe projection from inside the pipe.

[0002]

[Prior art and its problems]

 The present applicant has previously proposed a construction method in which the inner surface lining of the buried pipe branch pipe portion is performed by using a hard tube inserted into the inside of the branch pipe opening that opens to the ground (for example, Japanese Patent Publication No. Hei 1-171926). See construction method). According to this lining method, the extra end of the tube projects from the branch pipe into the buried pipe, and it is necessary to cut and remove this extra extra end from the pipe after lining.

Conventionally, as a device for cutting such a pipe protrusion, a device having a structure schematically shown in FIG. 11 is known. According to this known cutting device, the saw blade 2'at the tip of the rotary drum 1'can be cut by pressing it against the in-tube protrusion b from the tube axis direction. Therefore, the closer the outer diameter of the drum 1'to the inner diameter of the pipe a, the more the inner pipe protrusion b can be cut at a position closer to the inner surface of the pipe a. However, there are often protrusions (not shown) such as protrusions of the mounting pipe and steps of the joint in the pipe a, so that the outer diameter of the drum does not come into contact with the above protrusion in order to secure the in-pipe mobility. There is no choice but to make it small, and this will inevitably leave some of the pipe projections in the pipe projection state.

The present invention has been made for the purpose of eliminating such conventional problems.

[0005]

[Means for solving problems]

 The present invention relates to a carriage that is movable in a pipe axis direction in a pipe, and a movable base that is reciprocally moved in the pipe axis direction by operating a first drive device while being supported on the carriage. A brake pad which is reciprocally moved in the pipe radial direction by operating the second drive device while being supported above the pipe; and on the moving base, the pipe being supported on the moving base. A rotary shaft that is oscillated and rotated by the operation of the third drive device on the central axis of the oscillating body, and an oscillating base fixed to the tip of the shaft are further provided, and the oscillating base is further provided with the oscillating base. A cutter blade projecting forward from the front end of the pipe in parallel with the central axis of the pipe and movable in the pipe axial direction and the pipe radial direction with respect to the base; and a fourth drive device for reciprocating the cutter blade in the pipe radial direction. And a fifth drive device that alternately reciprocates the cutter blade in the pipe axis direction at an appropriate pitch. According to the cutting device in the pipe projections, characterized in being.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

As is apparent from FIGS. 1 to 4 showing the installation condition of the device of the present invention in the pipe, the device of the present invention comprises a carriage 1 which is movable in the pipe a in the pipe axial direction, and on the carriage 1, A brake pad 3 is provided which is operated by the first drive device 2 to reciprocate in the radial direction of the pipe. As the first drive device 2, a pair of left and right cylinders (see FIG. 4) fixed to the frame 1a of the carriage 1 is used.

Further, on the carriage 1, there is provided a moving table 5 which is operated by the second driving device 4 to reciprocate in the tube axis direction. As shown in FIG. 3, the trolley 1 has a guide rail 1b extending in the tube axis direction at an intermediate portion of the frame 1a. It will be reciprocated by guidance. A cylinder 4a is shown as the second drive device 4, the cylinder 4a is fixedly mounted on the carriage 1, and the tip of a piston rod 4b provided on the cylinder 4a is a front bearing 5b provided on the moving base 5. Is integrally connected to the back of the. A through hole 5d, through which the rear portion of the cylinder 4a moves in and out when the movable table 5 reciprocates, is provided below the rear bearing 5c.

A rotary shaft 7 that is oscillated and rotated by the operation of a third drive device 6 (see FIG. 2) is supported on the moving base 5 via front and rear bearings 5b and 5c, and The central axis is substantially coincident with the central axis of the tube a. The rotary shaft 7 has a screw portion 7a on the outer peripheral surface, and a screw cylinder 8 having a screw portion 8a on the inner peripheral surface that meshes with the screw portion 7a is screwed onto the shaft 7, and the screw cylinder 8 is attached to the third screw cylinder 8a. By operating the drive device 6 to reciprocate along the shaft 7, the shaft 7 can be oscillated and rotated. A pair of left and right cylinders fixed to the moving table 5 as the third driving device 6 (see FIG. 2) is shown, and the tip of the piston rod 6a of the cylinder 6 is integrated with the screw cylinder 8 through the support member 6b. Are connected to.

A guide rod 6c extending rearward in the pipe axis direction is provided in the middle of the support member 6b in the width direction, and the rod 6c is supported by an auxiliary bearing 5e fixedly mounted on the rear bearing 5c. ..

A swing base 9 is integrally provided at the tip of the rotary shaft 7, and is movable on the swing base 9 in the pipe axis direction and in the pipe radial direction, and projects forward from the front end of the base 9. A cutter blade 10, a fourth drive device 11 for moving the cutter blade 10 in the pipe radial direction, and a fifth drive device 12 for moving the cutter blade 10 in the pipe axial direction are provided.

The cutter blade 10 is extended in the axial direction of the pipe, and is configured so that the protrusion in the pipe can be cut by sawing at the side blade 10a (see FIG. 2). The cutter blade 10 is attached and fixed to the blade receiving member 13 at the base end portion 10b, and the blade receiving member 13 is fitted in the guide groove 15 (see FIG. 6) of the blade receiving base 14 so as to be movable in the pipe axis direction. Has been done. Further, the blade receiving member 13 is connected to the eccentric position of the rotary disc 17 via the link 16, and the rotary disc 17 is integrally connected to the blade pedestal 14 via the bearing 18 in the lower cylindrical portion 17a. Reference numeral 14 is arranged in a steady state between both side plates 9a of the rocking base 9. When the tool holder 14 is operated by the fourth driving device 11 provided on the rocking table 9 to reciprocate in the radial direction of the pipe, as the tool holder 14 reciprocates, the bearing 18, the tubular portion 17a, The turntable 17, the link 16, the blade receiving member 13 and the cutter blade 10 simultaneously reciprocate in the pipe radial direction.

The tubular portion 17a of the turntable 17 is integrated with the rotary shaft 12a of the fifth drive device 12 (for example, a hydraulic motor) mounted on the rocking base 9 in the axial direction integrally with the rotating direction of the shaft 12a. Freely linked to the direction. Therefore, the tubular portion 17a rotates together with the shaft 12a, but can move along with the tool holder 14 in the axial direction of the shaft 12a.

In the forward movement position shown in FIG. 5, when the fifth drive device 12 is operated to rotate the turntable 17, the base end pinned portion 16a of the link 16 is moved to the above-mentioned position as shown in FIG. Since the eccentric position of the board 17 is moved while drawing the locus of the circle 19, the blade receiving member 13 connected by the tip of the link 16 and the pin 16b and thus the cutter blade 10 are guided by the guide groove 15 and the diameter of the circle 19 is increased. Is linearly reciprocated with one pitch as a pitch, and the cutting by the side blade 10a of the cutter blade 10 becomes possible.

A contact 20 for confirming the position of the protrusion in the pipe is provided at the tip of the rocking base 9 so as to be positioned at the center of the pipe, and at least the tip of the corresponding member 20 is formed of a cushion material such as rubber. Is preferred. This hit 20 is not always necessary and may be omitted.

As shown in FIG. 7, a pair of left and right guide rolls 21 and 21 that come into contact with the inner surface of the pipe a when the table 14 is moved forward can be provided at both ends of the front surface of the blade receiving table 14. The guide rolls 21 and 21 roll on the inner surface of the pipe a when the rocking base 9 swings to reduce contact frictional resistance generated between the guide rolls 21 and 21 and the inner radius of the pipe a. Functions as a directional positioning member.

FIG. 9 shows the device A of the present invention and the television camera car B which have been moved in the tube a to the vicinity of the in-tube protrusion b to be cut.

The movement of the device of the present invention in the pipe is as shown in FIG. 1, that is, the cutter blade 10 and the brake pad 3 are kept at the forward movement positions away from the inner surface of the pipe, and the movable table 5 is kept at the forward movement position. It is performed under the condition of being present. During this movement in the pipe, the cutter blade 10 holds the position apart from the inner surface of the pipe, so that even if there is any protrusion inside the pipe such as the protrusion of the mounting pipe, it will not be caught in the pipe a. Can be moved smoothly. During the movement in the pipe, the cutter blade 10 keeps a position (see FIG. 10) which is rotated by about 90 ° laterally from the top position shown in FIG. 9 in order to avoid collision with the pipe protrusion b. There is. Such position adjustment of the cutter blade 10 can be easily performed by swinging and rotating the swing base 9 at an appropriate angle.

The movement of the device A of the present invention in the pipe is carried out under the supervision of the television camera car B in the pipe as shown in FIG. 9, and when the hit 20 hits the protrusion b in the pipe, the movement is stopped immediately. It When the contact 20 abuts the in-pipe protrusion b, the cutter blade 10 and the above-mentioned protrusion b are aligned in the pipe axial direction.

After stopping the device A of the present invention at the position where the device A hits the in-pipe protrusion b, the first drive device 2 is actuated to move the brake pad 3 in the pipe radial direction as shown in FIG. It is moved forward and strongly crimped to the inner surface of the pipe a. The carriage 1 of the device of the present invention is restrained in the pipe a by crimping the brake pad 3 to the inner surface of the pipe. Next, the second drive device 4 is actuated to move the movable table 5 slightly backward from the forward position of FIG. 1, and in this backward movement, the contact 20 provided at the front end of the table 5 is separated from the in-pipe protrusion b, It becomes free, and the oscillating table 5 is ready to oscillate freely. This state is shown in FIG.

Then, in the state shown in FIG. 5, the fourth drive device 11 is actuated to move the cutter blade in the radial direction of the pipe to bring it closer to the inner surface of the pipe as much as possible. The drive device 12 is operated to give the cutter blade 10 a small pitch and reciprocating reciprocating motion in the pipe axis direction, and the so-called sawing operation is performed, while the third drive device 6 is operated to operate the cutter. By rotating the blade 10 through the rotary shaft 7 and the swing base 9 in the direction around the central axis of the shaft 7, the in-pipe protrusion b can be cut at a position close to the inner face of the pipe.

After cutting, by returning to the state of FIG. 1 again, it is possible to prepare for the next cutting work.

[0023]

【effect】

 According to the device of the present invention, the cutter blade extending in the axial direction of the pipe can selectively take two positions, that is, a position where the cutter blade is separated from the inner surface of the pipe toward the center of the pipe and a position where it is as close as possible to the inner surface of the pipe. With this configuration, when moving inside the pipe, it is possible to move smoothly inside the pipe by locating a position farther than the inner surface of the pipe. By locating a position close to the pipe, it is possible to cut along the inner surface of the pipe, and it has the feature that the protrusion inside the pipe can be cut at a position as close as possible to the inner surface of the pipe without impairing mobility inside the pipe.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the device of the present invention and a situation of installation in a pipe.

FIG. 2 is a plan view of the same.

FIG. 3 is a right side view of FIG.

4 is a cross-sectional view taken along line 4-4 of FIG.

FIG. 5 is a view corresponding to FIG. 1, showing a state of alignment between the device of the present invention and a pipe projection.

FIG. 6 is a front view of FIG. 5, in which a pipe protrusion is omitted.

FIG. 7 shows a situation in which a tool rest is provided with a guide roll,
It is a figure corresponding to FIG.

FIG. 8 is an explanatory diagram showing an operating state of a link.

FIG. 9 is an explanatory view showing a state in which the device of the present invention is brought close to a pipe projection, together with a television camera car.

FIG. 10 is an explanatory diagram schematically showing the positional relationship between the in-tube protrusion and the cutter blade during movement in the tube.

FIG. 11 is an explanatory diagram of a conventional device.

[Explanation of symbols]

 1 trolley 2 1st drive device 3 brake pad 4 2nd drive device 5 moving stand 6 3rd drive device 7 rotating shaft 8 screw cylinder 9 rocking stand 10 cutter blade 11 4th drive device 12 5th drive device 13 blade receiving member 14 Tool rest 15 Guide groove 16 Link 17 Rotating plate 18 Bearing 19 Circle of rotation locus

Claims (1)

[Scope of utility model registration request] 1. A moving table which is reciprocally moved in the tube axis direction by operating a first drive device while being supported on the cart, which is movable in the tube axis direction. A brake pad which is reciprocally moved in the pipe radial direction by operating the second drive device while being supported on the vehicle; and on the moving base, the pipe being supported on the moving base. Is provided with a rotary shaft that is oscillated and rotated by operating the third drive device on the central axis of the oscillating shaft, and a oscillating base that is fixedly provided at the tip of the shaft. A cutter blade projecting forward from the front end of the pipe in parallel with the central axis of the pipe and movable in the pipe axial direction and the pipe radial direction with respect to the base; and a fourth drive device for reciprocating the cutter blade in the pipe radial direction. And a fifth drive device for alternately reciprocating the cutter blade in the pipe axis direction at an appropriate pitch. And cutting device in the tube projections, characterized in that are.